diff --git a/source/app/controllers/util.py b/source/app/controllers/util.py
index 39a54e9..979dacc 100644
--- a/source/app/controllers/util.py
+++ b/source/app/controllers/util.py
@@ -349,8 +349,8 @@ class Certificado(object):
         data['cer_txt'] = cer_txt.replace('\n', '')
         data['serie'] = serie
         data['rfc'] = rfc
-        data['desde'] = desde
-        data['hasta'] = hasta
+        data['desde'] = desde.replace(tzinfo=None)
+        data['hasta'] = hasta.replace(tzinfo=None)
         return data
 
     def _get_p12(self, password, rfc):